Ink composition, image forming method, and printed article using the same

a technology of composition and image, applied in the field of composition and image forming methods, can solve the problems of insufficient image strength or glossiness of formed images, insufficient viscosity of composition using latex, and inability to further improve the bleeding of printed articles, etc., to achieve excellent adhesiveness, excellent toughness and glossiness

Active Publication Date: 2013-08-15
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an ink composition that can form an image without bleeding and has excellent toughness, glossiness, and adhesiveness with various substrates even when being dried at a low temperature. Additionally, an image forming method and a printed article that includes the ink composition and has excellent toughness, glossiness, and adhesiveness with various substrates can also be provided.

Problems solved by technology

However, when being dried, the ink composition using latex exhibits insufficient viscosity increase, and bleeding of the printed article can be further improved.
In addition, there is a problem that when the ink composition is dried at a low temperature, image strength or the glossiness of the formed image becomes insufficient.

Method used

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  • Ink composition, image forming method, and printed article using the same
  • Ink composition, image forming method, and printed article using the same
  • Ink composition, image forming method, and printed article using the same

Examples

Experimental program
Comparison scheme
Effect test

synthesis example 1

Synthesis of Polymer Dispersant E-1

[0175]44 g of methyl ethyl ketone was put in a 500 ml three-neck flask including a stirrer and a condenser and heated at 72° C. under a nitrogen atmosphere, and a solution obtained by dissolving 0.43 g of dimethyl 2,2′-azobisisobutyrate, 30 g of benzyl methacrylate, 5 g of methacrylic acid, and 15 g of methyl methacrylate in 25 g of methyl ethyl ketone was added dropwise thereto over 3 hours. After the dropwise addition ended, the solution was reacted for an hour. Thereafter, a solution obtained by dissolving 0.21 g of dimethyl 2,2′-azobisisobutyrate in 1 g of methyl ethyl ketone was added thereto, and the temperature of the resultant was increased to 78° C. to perform heating for 4 hours. The obtained reaction solution was reprecipitated twice in an excess amount of hexane, and the precipitated resin was dried, thereby obtaining 43 g of a polymer dispersant E-1.

[0176]The composition of the obtained resin was confirmed by 1H-NMR, and the weight av...

synthesis example 2

Preparation of Dispersion of Resin-Coated Pigment

[0177](Resin-Coated Cyan Pigment Dispersion (C))

[0178]10 parts of Pigment Blue 15:3 (Phthalocyanine Blue A220 manufactured by Dainichiseika Color & Chemicals Mfg. Co., Ltd.), 5 parts of the polymer dispersant E-1 obtained in the Synthesis example 1, 42 parts of methyl ethyl ketone, 5.5 parts of a 1 mol / L aqueous NaOH solution, and 87.2 parts of deionized water were mixed together, and dispersed for 2 to 6 hours by a beads mill using 0.1 mmφ zirconia beads.

[0179]The obtained dispersion was heated at 55° C. under reduced pressure to remove methyl ethyl ketone and a portion of water, thereby obtaining a dispersion of a cyan pigment that was coated with the polymer dispersant E-1 and had a pigment concentration of 10.2% by mass. Hereinafter, the pigment dispersion will be called a “C dispersion”.

synthesis example 3

Synthesis of Comparative Water-Soluble Copolymer (B-1)

[0180]10.0 g of 2-butanone (manufactured by Wako Pure Chemical Industries, Ltd.) was put in a 200 mL three-neck flask including a stirring blade, and then stirred under heating for 10 minutes in an oil bath at 80° C. under a nitrogen atmosphere. Subsequently, a mixed solution of 24 g of n-butyl methacrylate (manufactured by Wako Pure Chemical Industries, Ltd.), 6.0 g of methacrylic acid (manufactured by Wako Pure Chemical Industries, Ltd.), 0.1 g of 6-mercaptohexanol (Sigma-Aldrich Co. LLC, Japan), 80 mg of dimethyl 2,2′-azobis(isobutyrate) (Wako Pure Chemical Industries, Ltd.), 30 g of 2-butanone, and 5 g of 2-propanol (Wako Pure Chemical Industries, Ltd.) was added dropwise for 3 hours to 2-butanone which was being heated under stirring in the flask. The solution was further stirred for 3 hours, and then 46 mg of dimethyl 2,2′-azobis(isobutyrate) was added thereto, followed by stirring with heating under reflux for 3 hours.

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Abstract

Provided is an ink composition that can form an image in which bleeding caused when the image is recorded by an ink jet method is inhibited and which has excellent toughness and glossiness and shows excellent adhesiveness with respect to various substrates, even when being dried at a low temperature.The ink composition is an ink composition for an ink jet including (a) an alkyl(meth)acrylate copolymer which contains an alkyl(meth)acrylate having 7 to 22 carbon atoms in total and a repeating unit derived from (meth)acrylic acid and has an acid value of 1.3 mmol / g to 2.0 mmol / g in an unneutralized state, and (b) an aqueous medium containing water.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an ink composition, an image forming method, and a printed article using the same.[0003]2. Description of the Related Art[0004]As image recording methods for forming an image on a recording medium such as paper based on image data signals, there are an electrophotographic method, sublimation- and fusion-type thermal transfer methods, an ink jet method, and the like. The electrophotographic method requires a process for forming an electrostatic latent image on a photosensitive drum by charging or exposure, so the system becomes complicated. As a result, the method has a problem of the increase in production cost and the like. In addition, though the device for the thermal transfer method is inexpensive, the method uses ink ribbons. Therefore, the method has problems that the running cost is high, waste materials are produced, and the like.[0005]On the other hand, in the ink jet method, an...

Claims

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Application Information

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IPC IPC(8): C09D11/00C09D11/023C09D11/033C09D11/037C09D11/10C09D11/106C09D11/107C09D11/30C09D11/322
CPCC09D11/30C09D11/107B41J2/2107
Inventor SHIMOHARA, NORIHIDENAKANO, RYOICHI
Owner FUJIFILM CORP
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